Setts



' 2 Sheets-Sheet 1 W. B.'LEARNED 8v L. MURRAY.

(No Model.)

. PINIDN mom@ MAGHINB.

Patented Apr. 9, 1889.

(No Model.) 2 Sheets-Sheet 2.` W. B. LEARNBD 8v L. MURRAY.

PINION FAGING MACHINE. Y

Patented Apr. 9, M389..

E?. wslmligi mmm @N m r M M NNN E UNITED STATES PATENT Fries.

VILLIAM B. LEARNED AND LEONIDAS MURRAY, OF BOSTON, MASSACHU- SETTS,ASSIGNORS OF ONEJIALF TO THE E. llOlVARl) VUATCH AND CLOCK COMPANY, OFSAME PLACE.

PlNlON-FAClNG MACHINE'.

SPECIFICATION forming part of Letters Patent No. 401,180, dated April 9,1889.

Application filed May 6 1887. Serial No. 237,296. (No model.)

To @ZZ 1071/0111, it 11mg/ con/cern:

Be it known that we, lVILLIAM B. LEARNED and Lnolvnms MURRAY, ofBoston,v in the county of Suolk and State of Massachusetts, haveinvented certain new and useful Improvements in Pinion-Facing Machines,of which the following is a specification.

This invention relates to the operation of finishing or polishing theends of the leaves or teeth of watch or clock piniens, said op erationbeing technically known as facing. This operation is performed bysubjecting the end of the pinion to a facing-shell, which is acylindrical piece of metal having a central hole which receives thestaff of the pinion, the end of the shell surrounding said holepresenting an annular polishing-face, which is in contact with the endsof the pinionleaves, and performs the facing or polishing operationthereon. The shell should have some freedom of lateral movement acrossthe pinion end, so that it will not leave concentric marks thereon, andthe shell should also be capable of rocking slightly during theoperation, so that it will impart to the pinion end a slight concavitywhich so reflects the light as to give the pinion end a highly desirableappearance.

lt has been commen for the operator in facing by hand to hold thefacing-shell in one hand while presenting it to the pinion, and at thesame time rotating or oscillating the pinion by a liddle-bow held in theother hand, the pinion being inserted in acollet, which has a groovedpulley engaged with the string of the fiddle-bowlhe slight movements ofthe shell, which are necessarily produced by the involuntary movement-set' the operatos hand and arm, are found to produce very perfeet resultsin imparting a polish free `from tool-marks, and in giving to the pinionend the slight concarity which is so much desired.

ln Letters Patent ofthe United States granted to lV. B. Learned February22, 1887, No. 358,@2, a facing-shell is shown in engage ment with a helder adapted to rotate the shell, the holder being adapted to rockslightly while in contact with the pinion, and thereby imitate themotion of a shell held and presented loy the operators hand.

The present invention has for its object to provide a power-drivenmachine in which the facing-shell is adapted to rock on the spindle orholder that rotates it, as shown in the above-named patent, and in whicheither the said spindle or the chuck that holds the pinion is adapted torock, or in which both the spindle and chuck are adapted to rock, sothat any desired degree of freedom of movement of the facing-shellrelatively to the pinio'n on which it acts may be attained.

To these ends our invention consists in the improvements which we willnew proceed to describe. v

Of the accompanying drawings, forming a part of this specification,Figure l represents a side elevation of our improved machine. Fig. 2represents a top plan view of the same. Fig. 3 represents a longitudinalsection on line Qc, Fig. 2. Fig. 4 represents a section on line .e .2',Fig. 3, looking toward the right. Fig. 5 represents a section on line 4yy, Fig. 3, looking toward the left. Fig. G represents a side view of anoperating device for the headstoek spindle.

The same letters of reference indicate the same parts in all thefigures.

In the drawings, a. represents a bed secured to a pedestal, l1, which isprovided with a vertical-rod, c, and a clamping-nut, d, working' on thethreaded lower end of said rod and adapted to secure the pedestal l) toa bench,

j', as shown in Fig. f5.

rlhe hed d has a longitudinal groove, (j, in the side oi' which areformed the smaller grooves, 7l 71, which receive thel ears of theclamping-lugs j j', attached, respectively, to the head-stock it andtail-steek Z.

m represents the spindle or holder which supports the facing-shell n,said shell being engaged with the spindle, so as to rotate there- Withan d rock thereon, substantially as shown in the Learned. patent abovereferred to.

The tail-stock is adapted to slide on the hase of, and is provided withany suitable devices whereby pressure may be applied to the lug j tolock the latter to the bed. The portion 2 of the tail-stock, in whichthe spindle or holder vm is journalcd, is connected, by pivotsorxtrunnions 4 4, with the base 3 of the tail-stock, said trunnionsbeing arranged to permit the spindle or holder m to rock laterally, andthus impart a rocking motion to the facing-shell, in addition to theindependent rocking motion of the shell upon said spindle. The extent oflateral motion permitted by the described construction of the tail-stockis limited by screws or stops 5 5 in lugs 6 0, attached to the base ofthe ytail-stock, said screws being adjustable, so that they may eitherprevent any oscillating motion of the pivoted portion 2 of thetail-stock, as shown in 4, or may permit any desired extent of suchmotion. The base of the tail-stock has an upper section, 3', which isadapted to turn on the lower portion of said base and supports thepivots or trunnions 4 4. The section 3 has an arm or stud, 7, standingbetween adjustable screws S, which limit the turning motion of thesection 3', and maylbe adjusted to permit said section to oscillate toany desired extent horizontally, and thus permit the spindle m tooscillate horizontally, the facing-shell being thus given an additionalfreedom of movement. The screws S 8 may be adjusted, however, so thatthe section 3 cannot turn. The upper section, 3, may be adapted to turn,as described, by any suitable means. In Fig. we have shown the saidsection 3 journaled on a beaded stud, A, aiiixed to the lower portion ofthe base and constituting a center on which the section 3 may rotate oroscilla-te horizontally.

The spindle m is adapted to slide freely in the bearings formed for itin the swinging portion 2 of the tail-stock, and is pressed and heldforward by the operator during the facing operation. spindle ym,receives motion from a suitable motor. l

The head-stock L is composed of a base, l0, bearing on the bed c, and aframe, Il, in which the head-stock spindle q is journaled, stid framebeing connected to the base by bolts or pivots l2 l2,which permit saidframe and spindle to rock laterally, said rocking motion beingcontrolled by screws or stops 13 13, inserted in ears 14 14 on the framell and bearing against the base lO. The pinion 7', held by thehead-stock spindle, maytherefore be oscillated or moved back and forthlaterally to any desired extent to move the end of the pinion across theacting face of the facing-shell. It will be seen, therefore, thatprovision is made for any desired extent of lateral motion, either ofthe spindle carrying the facing-shell or of the pinion being faced, orof both, so that any desired freedom of lateral movement of the pinionend and facing-shell relatively to each other may be attained.

A pulley, p, affixed to ther The l head-stoel; spindle has a spirally-A'n.r, and is moved thereby to give the headstock spindle the describedmotion, the cord being' wound around the spirally-grooved pulley s. Anyother suitable devices may be employed to reciprocate said cord.

The jar attending the operation of the machine and the rapid reversal ofthe rotation of the head-stock spindle may be reliedupon to produce thedescribed lateral movements of the shell-carrying spindle m andheadstock spindle q. XVe prefer, however, to give the head-stock spindlea positive lateral reciprocating movement by means of an eccentric, A,on a driving-shaft, B, and a rod, C, connecting said eccentric with thepivoted frame 1l., in which the head-stock spindle is journaled.

If desired, the tail-stock spindle m may be positively moved by similarmeans.

The machine thus organized is capable of imparting a beautiful finish topinion ends, the result being quite as desirable as that produced by theold hand method first above described and much more rapid andeconomical.

l. In a pinion-facing machine, the combination of a supporting-bed, ahead-stock having a pinion-holding spindle, a tail-stock having alaterallymovable portion, a spindle journaled in said movable portion,and thereby adapted to reciprocate laterally, and afacing-shellsupported by said spindle and having an independent rocking movementthereon, as set forth.

2. In a pinion-facing machine, the combination of a supporting-bed, atail-stock having aspindle, a facing-shell supported by said spindle andhavingla rocking or oscillating motion thereon, and a head-stock havinga laterally-movable portion, and a pinion-holding spindle journaled insaid movable portion,

and thereby adapted to reciprocate laterally, as, set forth.

Alathe-stockcomposed of abasea frame pivoted to said base, and a spindlejournaled in said frame, combined with power-driven devices, as aneccentric, A, and connectingrod C, whereby a continuous rapid rocking oroscillating motion may be automatically imparted to said frame andspindle, as set forth.

4. In a pinion-facing machine, the combination of a spindle having agrooved pulley, a facing-shell supported by said spindle and IOO IIO

adapted to Vrock, a cord engaged with said pulley, and power-drivendevices, as a Crank- Wheel, 1c, and rod fr, for reciprocating said coreland jarring o1 rocking the facing-shell, as set forth.

lu testimony whereof We have signed our names To this spoocntio11,in thepresence of two subscribing witnesses, this 30th day of April, 18S?.

VILLIAM B. LEARNED. LEONIDAS MURRAY. lVitnesses:

C. F. BROWN, ARTHUR W. CROSSLEY.

